KVM: selftests: Always open VM file descriptors with O_RDWR

Drop the @perm param from vm_create() and always open VM file descriptors
with O_RDWR.  There's no legitimate use case for other permissions, and
if a selftest wants to do oddball negative testing it can open code the
necessary bits instead of forcing a bunch of tests to provide useless
information.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/aarch64/get-reg-list.c

@@ -416,7 +416,7 @@ static void run_test(struct vcpu_config *c)
 
 	check_supported(c);
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 	prepare_vcpu_init(c, &init);
 	aarch64_vcpu_add_default(vm, 0, &init, NULL);
 	finalize_vcpu(vm, 0, c);

tools/testing/selftests/kvm/aarch64/psci_test.c

@@ -78,7 +78,7 @@ static struct kvm_vm *setup_vm(void *guest_code)
 	struct kvm_vcpu_init init;
 	struct kvm_vm *vm;
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 	kvm_vm_elf_load(vm, program_invocation_name);
 	ucall_init(vm, NULL);
 

tools/testing/selftests/kvm/aarch64/vcpu_width_config.c

@@ -24,7 +24,7 @@ static int add_init_2vcpus(struct kvm_vcpu_init *init1,
 	struct kvm_vm *vm;
 	int ret;
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 
 	vm_vcpu_add(vm, 0);
 	ret = _vcpu_ioctl(vm, 0, KVM_ARM_VCPU_INIT, init1);
@@ -49,7 +49,7 @@ static int add_2vcpus_init_2vcpus(struct kvm_vcpu_init *init1,
 	struct kvm_vm *vm;
 	int ret;
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 
 	vm_vcpu_add(vm, 0);
 	vm_vcpu_add(vm, 1);
@@ -86,7 +86,7 @@ int main(void)
 	}
 
 	/* Get the preferred target type and copy that to init2 for later use */
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 	vm_ioctl(vm, KVM_ARM_PREFERRED_TARGET, &init1);
 	kvm_vm_free(vm);
 	init2 = init1;

tools/testing/selftests/kvm/dirty_log_test.c

@@ -679,7 +679,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
 
 	pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode));
 
-	vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
+	vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages);
 	kvm_vm_elf_load(vm, program_invocation_name);
 #ifdef __x86_64__
 	vm_create_irqchip(vm);

tools/testing/selftests/kvm/hardware_disable_test.c

@@ -104,7 +104,7 @@ static void run_test(uint32_t run)
 	for (i = 0; i < VCPU_NUM; i++)
 		CPU_SET(i, &cpu_set);
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 	kvm_vm_elf_load(vm, program_invocation_name);
 	vm_create_irqchip(vm);
 

tools/testing/selftests/kvm/include/kvm_util_base.h

@@ -110,9 +110,9 @@ int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id,
 void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
 const char *vm_guest_mode_string(uint32_t i);
 
-struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
+struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages);
 void kvm_vm_free(struct kvm_vm *vmp);
-void kvm_vm_restart(struct kvm_vm *vmp, int perm);
+void kvm_vm_restart(struct kvm_vm *vmp);
 void kvm_vm_release(struct kvm_vm *vmp);
 void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
 void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,

tools/testing/selftests/kvm/kvm_binary_stats_test.c

@@ -230,7 +230,7 @@ int main(int argc, char *argv[])
 	TEST_ASSERT(vms, "Allocate memory for storing VM pointers");
 	for (i = 0; i < max_vm; ++i) {
 		vms[i] = vm_create(VM_MODE_DEFAULT,
-				DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+				DEFAULT_GUEST_PHY_PAGES);
 		for (j = 0; j < max_vcpu; ++j)
 			vm_vcpu_add(vms[i], j);
 	}

tools/testing/selftests/kvm/kvm_create_max_vcpus.c

@@ -28,7 +28,7 @@ void test_vcpu_creation(int first_vcpu_id, int num_vcpus)
 	pr_info("Testing creating %d vCPUs, with IDs %d...%d.\n",
 		num_vcpus, first_vcpu_id, first_vcpu_id + num_vcpus - 1);
 
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 
 	for (i = first_vcpu_id; i < first_vcpu_id + num_vcpus; i++)
 		/* This asserts that the vCPU was created. */

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -173,9 +173,9 @@ void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size)
 	vm->dirty_ring_size = ring_size;
 }
 
-static void vm_open(struct kvm_vm *vm, int perm)
+static void vm_open(struct kvm_vm *vm)
 {
-	vm->kvm_fd = _open_kvm_dev_path_or_exit(perm);
+	vm->kvm_fd = _open_kvm_dev_path_or_exit(O_RDWR);
 
 	if (!kvm_check_cap(KVM_CAP_IMMEDIATE_EXIT)) {
 		print_skip("immediate_exit not available");
@@ -240,7 +240,6 @@ _Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params)
  * Input Args:
  *   mode - VM Mode (e.g. VM_MODE_P52V48_4K)
  *   phy_pages - Physical memory pages
- *   perm - permission
  *
  * Output Args: None
  *
@@ -253,12 +252,12 @@ _Static_assert(sizeof(vm_guest_mode_params)/sizeof(struct vm_guest_mode_params)
  * descriptor to control the created VM is created with the permissions
  * given by perm (e.g. O_RDWR).
  */
-struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
+struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages)
 {
 	struct kvm_vm *vm;
 
-	pr_debug("%s: mode='%s' pages='%ld' perm='%d'\n", __func__,
-		 vm_guest_mode_string(mode), phy_pages, perm);
+	pr_debug("%s: mode='%s' pages='%ld'\n", __func__,
+		 vm_guest_mode_string(mode), phy_pages);
 
 	vm = calloc(1, sizeof(*vm));
 	TEST_ASSERT(vm != NULL, "Insufficient Memory");
@@ -340,7 +339,7 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 		vm->type = KVM_VM_TYPE_ARM_IPA_SIZE(vm->pa_bits);
 #endif
 
-	vm_open(vm, perm);
+	vm_open(vm);
 
 	/* Limit to VA-bit canonical virtual addresses. */
 	vm->vpages_valid = sparsebit_alloc();
@@ -366,7 +365,7 @@ struct kvm_vm *vm_create_without_vcpus(enum vm_guest_mode mode, uint64_t pages)
 {
 	struct kvm_vm *vm;
 
-	vm = vm_create(mode, pages, O_RDWR);
+	vm = vm_create(mode, pages);
 
 	kvm_vm_elf_load(vm, program_invocation_name);
 
@@ -458,7 +457,6 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
  *
  * Input Args:
  *   vm - VM that has been released before
- *   perm - permission
  *
  * Output Args: None
  *
@@ -466,12 +464,12 @@ struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
  * global state, such as the irqchip and the memory regions that are mapped
  * into the guest.
  */
-void kvm_vm_restart(struct kvm_vm *vmp, int perm)
+void kvm_vm_restart(struct kvm_vm *vmp)
 {
 	int ctr;
 	struct userspace_mem_region *region;
 
-	vm_open(vmp, perm);
+	vm_open(vmp);
 	if (vmp->has_irqchip)
 		vm_create_irqchip(vmp);
 

tools/testing/selftests/kvm/set_memory_region_test.c

@@ -314,7 +314,7 @@ static void test_zero_memory_regions(void)
 
 	pr_info("Testing KVM_RUN with zero added memory regions\n");
 
-	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, 0);
 	vm_vcpu_add(vm, VCPU_ID);
 
 	TEST_ASSERT(!ioctl(vm_get_fd(vm), KVM_SET_NR_MMU_PAGES, 64),
@@ -354,7 +354,7 @@ static void test_add_max_memory_regions(void)
 		    "KVM_CAP_NR_MEMSLOTS should be greater than 0");
 	pr_info("Allowed number of memory slots: %i\n", max_mem_slots);
 
-	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, 0);
 
 	/* Check it can be added memory slots up to the maximum allowed */
 	pr_info("Adding slots 0..%i, each memory region with %dK size\n",

tools/testing/selftests/kvm/x86_64/amx_test.c

@@ -431,7 +431,7 @@ int main(int argc, char *argv[])
 		kvm_vm_release(vm);
 
 		/* Restore state in a new VM.  */
-		kvm_vm_restart(vm, O_RDWR);
+		kvm_vm_restart(vm);
 		vm_vcpu_add(vm, VCPU_ID);
 		vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 		vcpu_load_state(vm, VCPU_ID, state);

tools/testing/selftests/kvm/x86_64/evmcs_test.c

@@ -183,7 +183,7 @@ static void save_restore_vm(struct kvm_vm *vm)
 	kvm_vm_release(vm);
 
 	/* Restore state in a new VM.  */
-	kvm_vm_restart(vm, O_RDWR);
+	kvm_vm_restart(vm);
 	vm_vcpu_add(vm, VCPU_ID);
 	vcpu_set_hv_cpuid(vm, VCPU_ID);
 	vcpu_enable_evmcs(vm, VCPU_ID);

tools/testing/selftests/kvm/x86_64/max_vcpuid_cap_test.c

@@ -18,7 +18,7 @@ int main(int argc, char *argv[])
 	struct kvm_enable_cap cap = { 0 };
 	int ret;
 
-	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, 0);
 
 	/* Get KVM_CAP_MAX_VCPU_ID cap supported in KVM */
 	ret = vm_check_cap(vm, KVM_CAP_MAX_VCPU_ID);

tools/testing/selftests/kvm/x86_64/set_boot_cpu_id.c

@@ -88,7 +88,7 @@ static struct kvm_vm *create_vm(void)
 	uint64_t pages = DEFAULT_GUEST_PHY_PAGES + vcpu_pages + extra_pg_pages;
 
 	pages = vm_adjust_num_guest_pages(VM_MODE_DEFAULT, pages);
-	vm = vm_create(VM_MODE_DEFAULT, pages, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, pages);
 
 	kvm_vm_elf_load(vm, program_invocation_name);
 	vm_create_irqchip(vm);

tools/testing/selftests/kvm/x86_64/set_sregs_test.c

@@ -95,7 +95,7 @@ int main(int argc, char *argv[])
 	 * use it to verify all supported CR4 bits can be set prior to defining
 	 * the vCPU model, i.e. without doing KVM_SET_CPUID2.
 	 */
-	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES);
 	vm_vcpu_add(vm, VCPU_ID);
 
 	vcpu_sregs_get(vm, VCPU_ID, &sregs);

tools/testing/selftests/kvm/x86_64/sev_migrate_tests.c

@@ -54,7 +54,7 @@ static struct kvm_vm *sev_vm_create(bool es)
 	struct kvm_sev_launch_start start = { 0 };
 	int i;
 
-	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, 0);
 	sev_ioctl(vm->fd, es ? KVM_SEV_ES_INIT : KVM_SEV_INIT, NULL);
 	for (i = 0; i < NR_MIGRATE_TEST_VCPUS; ++i)
 		vm_vcpu_add(vm, i);
@@ -71,7 +71,7 @@ static struct kvm_vm *aux_vm_create(bool with_vcpus)
 	struct kvm_vm *vm;
 	int i;
 
-	vm = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm = vm_create(VM_MODE_DEFAULT, 0);
 	if (!with_vcpus)
 		return vm;
 
@@ -174,7 +174,7 @@ static void test_sev_migrate_parameters(void)
 		*sev_es_vm_no_vmsa;
 	int ret;
 
-	vm_no_vcpu = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	vm_no_vcpu = vm_create(VM_MODE_DEFAULT, 0);
 	vm_no_sev = aux_vm_create(true);
 	ret = __sev_migrate_from(vm_no_vcpu->fd, vm_no_sev->fd);
 	TEST_ASSERT(ret == -1 && errno == EINVAL,
@@ -186,7 +186,7 @@ static void test_sev_migrate_parameters(void)
 
 	sev_vm = sev_vm_create(/* es= */ false);
 	sev_es_vm = sev_vm_create(/* es= */ true);
-	sev_es_vm_no_vmsa = vm_create(VM_MODE_DEFAULT, 0, O_RDWR);
+	sev_es_vm_no_vmsa = vm_create(VM_MODE_DEFAULT, 0);
 	sev_ioctl(sev_es_vm_no_vmsa->fd, KVM_SEV_ES_INIT, NULL);
 	vm_vcpu_add(sev_es_vm_no_vmsa, 1);
 

tools/testing/selftests/kvm/x86_64/smm_test.c

@@ -204,7 +204,7 @@ int main(int argc, char *argv[])
 
 		state = vcpu_save_state(vm, VCPU_ID);
 		kvm_vm_release(vm);
-		kvm_vm_restart(vm, O_RDWR);
+		kvm_vm_restart(vm);
 		vm_vcpu_add(vm, VCPU_ID);
 		vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 		vcpu_load_state(vm, VCPU_ID, state);

tools/testing/selftests/kvm/x86_64/state_test.c

@@ -213,7 +213,7 @@ int main(int argc, char *argv[])
 		kvm_vm_release(vm);
 
 		/* Restore state in a new VM.  */
-		kvm_vm_restart(vm, O_RDWR);
+		kvm_vm_restart(vm);
 		vm_vcpu_add(vm, VCPU_ID);
 		vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 		vcpu_load_state(vm, VCPU_ID, state);

tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c

@@ -239,7 +239,7 @@ int main(int argc, char *argv[])
 		kvm_vm_release(vm);
 
 		/* Restore state in a new VM.  */
-		kvm_vm_restart(vm, O_RDWR);
+		kvm_vm_restart(vm);
 		vm_vcpu_add(vm, VCPU_ID);
 		vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
 		vcpu_load_state(vm, VCPU_ID, state);